Portable gravity dump-box.



K. K. PARKER & J. C. PROCTOR.

PORTABLE GRAVITY DUMP BOX.

APPLICATION mu) DC.4, 1911. RENEWED JAN. 18,1916.

1,196,91, Patented Aug. 29,1916.

KNIGHT K. PARKER AND JOHN C. PROCTOR, 0F SEATTLE, WASHINGTON; SAID FARKER ASSIGNOR TO SAID PROCTOR.

PORTABLE GRAVITY DUMP-BOX.

Specification of Letters Patent.

Patented Aug. 29, 19.16.

Application filed December 4, 1911, Serial No. 663,964. Renewed January 18, 1916. Serial No. 72,852.

To all whom it may concern:

Be it known that we, KNIGHT K. PARKER and JOHN C. Pnocron, citizens of the United States, residing at Seattle, in the county of King and State of Washington, have invented a certain new and useful Improvement in Portable Gravity Dump-Boxes, of which the following is a specification.

The invention relates to a dumping wagon body for hoisting and dumping material.

The object of the present inventionis to improve the construction of wagon bodies, and to provide a simple and inexpensive wagon body of strong and durable construction comprising a plurality of separate boxes or sections, adapted to be elevated above the wagon and conveyed at a distance therefrom for dumping or depositing its contents.

A further object of the invention is to provide a gravity dump box equipped with a hinged side normally locked in a vertical position and connected with the hoisting mechanism and adapted when released to cause the wagon box to assume automatically an inclined position, whereby a complete discharge of its contents is assured.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing :-Figure 1 is a side elevation of a wagon equipped with a dumping box or body, constructed in accordance with this invention, one of the boxes or sections being slightly elevated abovethe running gear. Fig. 2 is a perspective view of one of the boxes or sections, illustrating the arrangement of the parts when the hinged side is in its open position. Fig. 3 is an end elevation of the same, the normal or horizontal position of the box or sectionbeing illustrated in dotted lines. Fig. t 1s a side elevation of one of the boxes or sections, showing the same in an inverted position for unloading bricks. Fig. 5 is an end view of the same showing the Windlass for withdrawing the closure rack. Fig. 6 is a detail perspective view of the closure rack.

Like numerals of reference designate corresponding parts in all the figures of the drawing.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention, the body comprises in its con struction a pair of separate boxes or sections 1, removably arranged upon a running gear 2 and adapted to be lifted therefrom by hoisting mechanism 3 of a carrier 42, suspended from an overhead track 5 and adaptedto convey the boxes or sections 1 from the wagon body to the place of dumping and return the boxes 'or sections to the wagon after their contents have been discharged. The duplex wagon body formed by the two boxes or sections while adapted for handling various kinds of material is especially designed for conveying gravel and sand to a concrete mixer, and in practice their contents are discharged into a double hopper. This will enable such material to be handled with greaterrapidity and at a much lower cost than when the gravel and sand are dumped upon the ground and conveyed in wheelbarrows. The boxes or sections may also, as hereinafter fully described, be advantageously employed for the handling of bricks. Each box, which may be constructed of any suitable material, is composed of a horizontal bottom 6, rigid front and rear transverse Walls 7 and 8, a rigid side wall 9, and a hinged side wall or gate 10, adapted to be opened for discharging the contents of the box or section. The side or gate 10 is equipped at its upper edge with a plurality of, alined eyes 11 through which passes a horizontal pintle 12, having its terminals detachably secured in recesses 12 of the front and rear end walls 7 and 8 by pivoted hooks 12 adapted to be swung upwardly out of engagement with the ends of the pintle rod torelease the same, and retained in engagement therewith by gravity. The eyes 11 are preferably formed by metallic straps doubled to form the eyes and riveted or otherwise secured to the hinged side of the wall or box and located at the ends of the hinged side or gate and at spaced intermediate points.

The hinged side or gate 10 is equipped at its outer face with pivoted locking bars 13 V and 14, located adjacent to the lower edge of the hinged side or gate and arranged approximately in a horizontal position, as

7 clearly illustrated in Fig.1 of the drawing,

whenthe hinged side or gate is closed. The

inner portions of the lockingbars are 18, adapted to cause the locking bars to move, in unison. The outer ends of the locking bars 13 and 14 are provided with catches 19, whichengage fixed keepers secured to the outer faces of the end walls 7 and 8 and projecting therefrom in a direction laterally of th vehicle. The bottom 6 is also equipped with a horizontal keeper 21, secured to thelower face of the bottom 6 and projecting centrally from the side edge of the same and arranged to be engaged by a catch 22, carried by an arm 23 preferably formed integral with and depending from the locking bar 13 at a pomt below the pivot 15, when the locking bar 13 is raised by a trip rope 24. The end portions of the locking bars operate in guides 21 consisting of extensions of the end straps of the said hinged side or gate.

The fixed side 9 is provided at its upper edge adjacent to th ends of the box with spaced hooks 25, and the hinged side or gate is equipped with end hooks 26 located at points intermediate of the upper and lower edges of the hinged side or gate, as clearly shown in Fig. 1 of the drawing. The hooks 25 are adapted to engage the lower links of short chains 27 of a flexible suspensory or hanger, which is also provided with long chains 28 of' a length to extend to and engage the hooks of the hinged side or gate. The upper ends of the chains are connected to a ring 29, which is adapted to be hung on a hood 30 of the carrier 4. The locking bar 13 is provided at its outer portion with an eye 31 to which the trip rope is secured, and the said trip rope -extends upwardly from the locking bar 13 to the ring 29 and passes through the same. The chains of the suspensory or hanger are adapted to be engaged with the hooks of either box for lifting the same from the running gear, and when the hinged side or wall of the box is closed, the ring of the hanger or suspensory islocated directly above the center of gravity of the box, which is maintained in a horizontal position while it is being lifted from the wagon and carried to the hopper, or other place where it is desired to dump its contents. When the trip rope is pulled, it swings the catches out of engagement with the fixed keeper of the end walls and bottom of the box, and the weight of the box and its contents swings the hinged side or wall of the box upwardly to the position illustrated in Figs. 2 and 3 of the drawing.

'This increases the effective length of the long chains 28 and causes the box to tilt downwardly at its open side simultaneously with the opening movement of the hinged side or Wall, thereby insuring a complete discharge of the contents of the box and enabling the material contained in the box to be conveniently supplied to a hopper or other receptacle. The overhead track and the carrier enable the box to be quickly run from the wagon to the place of dumping and returned to the former, and by this operation sand, gravel and other material may be handled much more cheaply and quickly than is possible where the material is dumped on the ground and conveyed to a concrete mixer or other point in wheelbarrows. When the box is replaced on the running gear of the Wagon, the hinged side or wall is closed and relocked and the flexible suspensory or hanger is detached from the hooks 25 and 26.

When it is desired to carry bricks, a bail provided at their ends with plates 33 having sockets into which inwardly extended terminals 34 of the bail are sprung. The bail, which is connected with the carrier to enable the boxes to be elevated above the wagon and conveyed from the same, is of a size to permit the box to which it is connected to rotate on the inwardly extending horizontal terminals or pivots 34 to invert the box to the position illustrated in Figs. 4 and 5 of the drawing. The box is inverted and is lowered to the ground, pile of bricks, or other support upon which the bricks are to be piled and is lifted from them, leaving the bricks in a neat pile and obviating the necessity of handling the bricks individually and piling them in the ordinary manner. In order to retain the bricks within the box while the latter is being inverted and placed over the pile, a closure rack 35 is employed. The rack 35 consists of spaced longitudinal bars and transverse connecting rods 36 having terminal hooks 37 extended longitudinally in opposite directions, as clearly shown in Fig. 6 of the drawing. These hooks are adapted to be detachably engaged by hooks 38, pivoted to the sides of the box and adapted to be swung into and out of engagement with the hooks 37.

Each box is equipped at one end with a Windlass shaft 39, mounted in suitable bearings and provided at one end with a handle 40 and having side ropes 41 attached to it and adapted to be wound around it. The side ropes 41 are provided at their ends with eyes or rings 42, which are designed to be engaged with the hooks 37 farthest from the Windlass shaft. When the box is lowered and placed at a point where the bricks are to be piled, the Windlass is operated to slide the closure rack from beneath the bricks to empty the latter from the box, which is then lifted from over the bricks. Any other form of closure may be employed for retaining the bricks in the boxes while the latter are in an inverted position.

No claim is made in the present application to the closure rack and the means for operating the same.

That is claimed is l. The combination of a box provided with a gate hinged at its upper edge to the adjacent walls of the box at one side thereof and adapted to swing outwardly therefrom, a hanger having chains connected with the gate below the hinged edge thereof and with the opposite wall of the box, a locking device for securing the hinged gate in its closed position, and a trip line extending from the locking device and adapted to release the hinged gate, which increases the effective length of the chain to which it is connected to cause a tilting of the box.

2. The combination of a box having a gate hinged at the top, fixed keepers mounted on the box adjacent to the gate, locking bars pivoted intermediate of their ends to the gate and provided at their inner ends with intermeshing toothed portions, said locking bars being movable into and out of engagement with the said keepers, and tri ping means connected with one of the looking bars.

3. The combination of a box provided with a gate hinged at the top, fixed side and bottom keepers mounted on the box adjacent to the lower and side edges of the gate, locking bars pivoted to the gate and provided with coacting means for causing the bars to move in unison, said locking bars being arranged to engage the side keepers and one of the locking bars having a depending arm movable into and out of engagement with the bottom keepers.

4. The combination of a box including a bottom, a fixed side wall, fixed end walls provided at their upper portions with alined bearing recesses, a pintle arranged in the said recesses, pivoted hooks mounted on the end walls and detachably retaining the pintle in the said recesses, and a gate hinged at its upper edge to the box by the said pintle.

KNIGHT K. PARKER. JOHN C. PROOTOR.

Witnesses MARTHA PRooToR, HAZEL PRoo'roR.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

. Washington, D. C." 

